Blog de François Becker

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mercredi 30 septembre 2015

Compress a MP4 video using ffmpeg

This is the two-pass command, using a 2048k video bitrate:

ffmpeg -y -i <input>.mp4 -c:v libx264 -preset medium -b:v 2048k -pass 1 -c:a libfdk_aac -b:a 128k -f mp4 /dev/null && ffmpeg -i <input>.mp4 -c:v libx264 -preset medium -b:v 2048k -pass 2 -c:a libfdk_aac -b:a 128k <output>.mp4

samedi 21 mars 2015

Automate Octave script execution on save on Mac OS X

Let's say the octave script you are working on is located in ~/Documents/script.m . On save, you want it to be automagically executed by octave, including persistent figures.

Let's create a watchdog script ~/Documents/watchdog.sh:

#!/bin/bash
while true
do
  ATIME=`ls -al ~/Documents/script.m`
  if [[ "$ATIME" != "$LTIME" ]]
  then
    echo "Running octave script"
    echo "script" > ~/Documents/OCTAVEPIPE
    LTIME=$ATIME
  fi
  sleep 1
done

Make it executable: chmod u+x ~/Documents/watchdog.sh

Don't launch it yet. We are missing the OCTAVEPIPE pipe. Create it with mkpipe ~/Documents/OCTAVEPIPE

Launch the watchdog in a shell: ~/Documents/watchdog.sh or ./watchdog.sh if you are in the same directory.

In another shell, cd to /Documents/OCTAVEPIPE) | octave --interactive

Now edit and save your octave script, it shoud be executed after less than 1 second.

lundi 12 janvier 2015

Activer le protocole aptX sur Mac OS X

Activer le protocole aptX sur Mac OS X :

https://discussions.apple.com/thread/6483703

dimanche 20 mai 2012

Une politique de gestion de ses mots de passe

Comment gérer ses multiples mots de passe ? Il peut être déconseillé de les écrire, d'utiliser le même de multiples fois, d'utiliser des mots du dictionnaire ; il est également souvent conseillé de les choisir complexes, inintelligibles et très longs, et de les apprendre par cœur. Autant de recommandations difficiles à concilier, et qui ne sont probablement appliquées par personne dans leur intégralité.

Lire la suite...

samedi 28 janvier 2012

How to disable the F10 menu shortcut in Unity

In the newest versions of Ubuntu, Unity is the default user interface for GNOME. It introduces the controversial feature of a Mac OS X like menu bar. This menu bar is triggered by the F10 key shortcut; however, this shortcut is used in some desktop applications, for instance for the "step" functionality of Qt Creator's debugger.

To change or disable this shortcut, follow these steps:

  • open a terminal an launch gconf-editor
  • browse the tree to / > apps > compiz-1 > plugins > unityshell > screen0 > options
  • edit the value of the "panel_first_menu" key to another key (for example F12).

The new configuration should be immediately applied.